/*
 * The MIT License
 *
 * Copyright (c) 2011 Takahiro Hashimoto
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package jp.a840.websocket.handler;

import jp.a840.websocket.WebSocket;
import jp.a840.websocket.exception.WebSocketException;
import jp.a840.websocket.frame.Frame;
import jp.a840.websocket.util.PacketDumpUtil;

import java.nio.ByteBuffer;

/**
 * Packet Dump Utility
 *
 * <pre>
 * Dump mode:
 * HS_UP  : dump buffer of handshake upstream
 * HS_DOWN: dump buffer of handshake downstream
 * FR_UP  : dump buffer of frame upstream
 * FR_DOWN: dump buffer of frame downstream
 * ALL    : dump these streams
 * </pre>.
 *
 * @author t-hashimoto
 */
public class PacketDumpStreamHandler implements StreamHandler {

    /**
     * Instantiates a new packet dump stream handler.
     */
    public PacketDumpStreamHandler() {
    }

    @Override
    public void nextDownstreamHandler(WebSocket ws, ByteBuffer buffer,
                                      Frame frame, StreamHandlerChain chain) throws WebSocketException {
        if (PacketDumpUtil.isDump(PacketDumpUtil.FR_DOWN)) {
            PacketDumpUtil.printPacketDump("FR Downstream", buffer);
        }
        chain.nextDownstreamHandler(ws, buffer, frame);
    }

    @Override
    public void nextHandshakeDownstreamHandler(WebSocket ws, ByteBuffer buffer,
                                               StreamHandlerChain chain) throws WebSocketException {
        if (PacketDumpUtil.isDump(PacketDumpUtil.HS_DOWN)) {
            PacketDumpUtil.printPacketDump("HS Downstream", buffer);
        }
        chain.nextHandshakeDownstreamHandler(ws, buffer);
    }

    @Override
    public void nextHandshakeUpstreamHandler(WebSocket ws, ByteBuffer buffer,
                                             StreamHandlerChain chain) throws WebSocketException {
        if (PacketDumpUtil.isDump(PacketDumpUtil.HS_UP)) {
            PacketDumpUtil.printPacketDump("HS Upstream", buffer);
        }
        chain.nextHandshakeUpstreamHandler(ws, buffer);
    }

    @Override
    public void nextUpstreamHandler(WebSocket ws, ByteBuffer buffer,
                                    Frame frame, StreamHandlerChain chain) throws WebSocketException {
        if (PacketDumpUtil.isDump(PacketDumpUtil.FR_UP)) {
            PacketDumpUtil.printPacketDump("FR Upstream", buffer);
        }
        chain.nextUpstreamHandler(ws, buffer, frame);
    }

}
